Control device for pressure-tank type water-feeding device

  • Inventors:
  • Assignees: Hitachi Ltd
  • Publication Date: November 24, 1981
  • Publication Number: JP-S56151291-A

Abstract

PURPOSE: To prevent chattering of pumps by detecting the pressure of a pressure tank and controlling starting and stoppage of the pumps based thereon in the water- feeding device wherein a plurality of pumps having relatively large water-feeding capacity are combined with the small-sized pressure tank. CONSTITUTION: The pressure tank 5 is provided with a low-pressure side pressure detector 13 for delivering an instruction to start a preceding pump, which is closed by the 1st pressure H 1 and opened by the 2nd pressure H 2 , with a high-pressure side pressure detector 14 for delivering an instruction to stop a preceding pump, which is closed by the 3rd pressure H 3 and opened by the 4th pressure H 4 , with a low-pressure side pressure detector 15 for delivering an instruction to start a floower pump, which is closed by the 5th pressure H 5 and opened by the 6th pressure H 6 , and with a high-pressure side pressure detector 16 delivering an instruction to stop a follower pump, which is closed by the 7th pressure H 7 and opened by the 8th pressure H 8 . COPYRIGHT: (C)1981,JPO&Japio

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